SIEMENS RS485 Flush Mounted Room Thermostat User Manual
Flush-mounted room thermostat with RS485 Modbus
communications
RDF660MB/MM, RDF660MB
For 2-pipe, 2-pipe with electric heater and 4-pipe fan coil units
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AC 230 V operating voltage
Large, backlit display
On/off or 3-position control outputs
Automatic or manual fan speed control
ECM fan DC 0...10 V output
Operating modes: Comfort, Economy and Protection
Control depending on the room or the return air temperature
Automatic or manual heating/cooling changeover
Minimum and maximum limitation of room temperature setpoint
2 inputs for external or changeover sensor, keycard or window contact
Commissioning and control parameters via local HMI or RS485 Modbus
RS485 communicative interface in Modbus RTU slave mode
User and parameter settings can be retained or restored with power loss to
previous mode, Comfort mode or Protection mode
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Mounting on both round and square conduit boxes, 60 mm fixing centers
A6V12005486_en--_d
2022-11-14
Smart Infrastructure
| General | Details |
|---|---|
| Name | SIEMENS RS485 Flush Mounted Room Thermostat User Manual |
| Make | SIEMENS |
| Language | English |
| Filetype | PDF (Download) |
| File size | 1.07 MB |
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Siemens RS485 Manual: Questions and Answers
What does terminal Y1 control on a Siemens RS485?
Heating in heating/cooling mode, or heating and cooling combined in single-stage compressor systems. User Manual, p. 17
Can the Siemens RS485 control an electric heater alongside the compressor?
Yes, on the RDF660MB model only. Terminal E1 controls electric heaters in 1-stage compressor with electric heater configurations. User Manual, p. 17
How do I wire a cooling signal on the Siemens RS485?
In heating and cooling mode, connect the cooling output to terminal Y2. User Manual, p. 17
What does the Comfort mode mean on Siemens RS485?
Comfort is one of three operating modes selectable via the operating mode button on the thermostat. User Manual, p. 1
What warranty does Siemens RS485 have for third-party product use?
Siemens rejects any and all warranties when third-party products are used. User Manual, p. 9
How do I recalibrate the temperature sensor?
Change parameter P05 if the displayed room temperature doesn't match measured temperature after a minimum of one hour of operation. User Manual, p. 9
What's the maximum cable length for the Siemens RS485 temperature sensor input?
80 m. User Manual, p. 10
Where is the temperature sensor located on the Siemens RS485?
Built into the front panel. User Manual, p. 5
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